Journal
DIABETES
Volume 71, Issue 7, Pages 1591-1596Publisher
AMER DIABETES ASSOC
DOI: 10.2337/db22-0097
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Funding
- National Institute for Health Research (NIHR) Oxford Biomedical Research Centre (BRC)
- JDRF/Wellcome's Strategic Award
- Diabetes UK [16/0005480]
- Diabetes UK Harry Keen Fellowship [16/0005529]
- JDRF Career Development Award [5-CDA-2014-221-A-N]
- Network for Pancreatic Organ donors with Diabetes [RRID:SCR_014641]
- JDRF [nPOD: 5-SRA-2018-557-Q-R, 4-SRA-2017-473-A-A]
- Leona M. & Harry B. Helmsley Charitable Trust [2018PG-T1D053]
- Wellcome [107212/A/15/Z]
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C-peptide declines in type 1 diabetes, with younger patients experiencing more rapid loss of beta-cells.
C-peptide declines in type 1 diabetes, although many long-duration patients retain low, but detectable levels. Histological analyses confirm that beta-cells can remain following type 1 diabetes onset. We explored the trends observed in C-peptide decline in the UK Genetic Resource Investigating Diabetes (UK GRID) cohort (N = 4,079), with beta-cell loss in pancreas donors from the network for Pancreatic Organ donors with Diabetes (nPOD) biobank and the Exeter Archival Diabetes Biobank (EADB) (combined N = 235), stratified by recently reported age at diagnosis endotypes (<7, 7-12, >= 13 years) across increasing diabetes durations. The proportion of individuals with detectable C-peptide declined beyond the first year after diagnosis, but this was most marked in the youngest age group (<1-year duration: age <7 years: 18 of 20 [90%], 7-12 years: 107 of 110 [97%], >= 13 years: 58 of 61 [95%] vs. 1-5 years postdiagnosis: <7 years: 172 of 522 [33%], 7-12 years: 604 of 995 [61%], >= 13 years: 225 of 289 [78%]). A similar profile was observed in beta-cell loss, with those diagnosed at younger ages experiencing more rapid loss of islets containing insulin-positive (insulin+) beta-cells <1 year postdiagnosis: age <7 years: 23 of 26 (88%), 7-12 years: 32 of 33 (97%), >= 13 years: 22 of 25 (88%) vs. 1-5 years postdiagnosis: <7 years: 1 of 12 (8.3%), 7-12 years: 7 of 13 (54%), >= 13 years: 7 of 8 (88%). These data should be considered in the planning and interpretation of intervention trials designed to promote beta-cell retention and function.
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